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MIC38C43

20V, Current Mode SMPS Controller Family with Various UVLO and Max Duty Cycle

Status: In Production

Features:

  • Fast 40ns output rise and 30ns output fall times
  • -40°C to +85°C temperature range meets UC284x specifications
  • High-performance, low-power BiCMOS Process
  • Ultra-low start-up current (50µA typical)
  • Low operating current (4mA typical)
  • CMOS outputs with rail-to-rail swing
  • ≥500kHz current-mode operation
  • Trimmed 5V bandgap reference
  • Pin-for-pin compatible with UC3842/3843/3844/3845(A)
  • Trimmed oscillator discharge current
  • UVLO with hysteresis
  • Low cross-conduction currents
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC38C4x are fixed frequency, high performance, current-mode PWM controllers. BiCMOS devices are pin compatible with 384x bipolar devices but feature several improvements. Undervoltage lockout circuitry allows the '42 and '44 versions to start up at 14.5V and operate down to 9V, and the '43 and '45 versions start at 8.4V with operation down to 7.6V. All versions operate up to 20V. When compared to bipolar 384x devices operating from a 15V supply, start-up current has been reduced to 50µA typical and operating current has been reduced to 4.0 mA typical. Decreased output rise and fall times drive larger MOSFETs, and rail-to-rail output capability increases efficiency, especially at lower supply voltages. The MIC38C4x also features a trimmed oscillator discharge current and bandgap reference. MIC38C4x denotes 8-pin plastic DIP, SOIC, and MM8® packages. MIC38C4x-1 denotes 14-pin plastic DIP and SOIC packages. 8-pin devices feature small size, while 14-pin devices separate the analog and power connections for improved performance and power dissipation. For fast rise and fall times and higher output drive, refer to the MIC38HC4x.

Additional Features
    • Fast 40ns output rise and 30ns output fall times
    • -40°C to +85°C temperature range meets UC284x specifications
    • High-performance, low-power BiCMOS Process
    • Ultra-low start-up current (50µA typical)
    • Low operating current (4mA typical)
    • CMOS outputs with rail-to-rail swing
    • ≥500kHz current-mode operation
    • Trimmed 5V bandgap reference
    • Pin-for-pin compatible with UC3842/3843/3844/3845(A)
    • Trimmed oscillator discharge current
    • UVLO with hysteresis
    • Low cross-conduction currents
Parametrics
Name
Value
Supported Topologies
Forward,Flyback
Supported Outputs
1
Minimum Input Voltage (V)
7.6
Maximum Input Voltage (V)
20
Typical Tolerance (%)
±2
Duty Cycle Max (%)
0.96
Operating Frequency (Hz)
Adj. to 500kHz
Internal Voltage Bias
True
Input UVLO Typ (V)
8.4
Operating Supply Current (mA)
4
Package
8/PDIP, 8/SOIC, 8/MSOP 14/PDIP, 14/SOIC

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Application Notes


Development tools data is currently unavailable.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC38C43AYMM
0.025100
0.124600
8
MSOP
3x3mm
NiPdAu
e4
MIC38C43AYMM-TR
0.025100
0.334700
8
MSOP
3x3mm
NiPdAu
e4
MIC38C43YMM
0.025100
0.124600
8
MSOP
3x3mm
NiPdAu
e4
MIC38C43YMM-TR
0.025100
0.334700
8
MSOP
3x3mm
NiPdAu
e4
MIC38C43AYM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43YM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43XYM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43AYM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43YM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43XYM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38C43-1YM
0.143200
0.280702
14
SOIC
.150In(3.90mm)
Matte Tin
e3
MIC38C43-1YM-TR
0.143200
0.325000
14
SOIC
.150In(3.90mm)
Matte Tin
e3
MIC38C43YN
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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